Kobo's Pulse reading apps for iOS and Android is getting a really nifty Facebook social discussion feature where you can see what other people are saying—not just for the current book you're reading—but the current page.

I can see pretty great uses for this, for example, if you're getting to an intriguing of the plot where a new mystery is presented, you can flip over to the Kobo discussion and exchange theories with other people. It's just like how people got together and discussed episodes of Lost each week, trading ideas of how new information fit into the bigger puzzle. Instead of discussing a book as a whole, which loses the ability to focus in on the mystery as it happens, or chapters at a time, like you could with a book club, this lets you get as granular as you want, at your speed.

Unfortunately current versions of Kobo's hardware readers don't have this feature yet, and it's unclear if and when they'll get it.